public void setTeamsForUser(User user, Team ... teams) {
		Connection con = null;
		PreparedStatement prepared = null;
		try {
			con = DriverManager.getConnection(URL);
			con.setAutoCommit(false);
			con.setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED);
			prepared = con.prepareStatement(SQL_INSERT_PAIR);
			prepared.setInt(1, user.getId());
			for (Team team : teams) {
				prepared.setInt(2, team.getId());
				prepared.executeUpdate();
			}
			con.commit();
		} catch (SQLException ex) {
			rollback(con);
			ex.printStackTrace();
		} finally {
			close(prepared);
			close(con);
		}
	}

	public void deleteTeam(Team team) {
		Connection con = null;
		PreparedStatement prepar = null;
		try {
			con = DriverManager.getConnection(URL);
		prepar = con.prepareStatement(SQL_DELETE_TEAM_BY_NAME);
			prepar.setString(1, team.getName());
			prepar.executeUpdate();
		} catch (SQLException ex) {
			ex.printStackTrace();
		} finally {
			close(prepar);
			close(con);
		}
	}